改革创新是民族精神的核心。
参考答案：错
.____ you prefer, I’ll give it to you. But we haven’t any other models for you to choose from.
A．Whatever
B．Whenever
C．Whichever
D．However
纯公共物品要通过公共部门( )来提供。
A．预算
B．估算
C．核算
D．计算
